[elpa] externals/posframe f864f0f 11/16: Always declare x-gtk-resize-child-frames as special

[Feng Shu]

branch: externals/posframe
commit f864f0ff29e4a6dd3bf4b57eaf7a951743d0fb27
Author: Dmitry Gutov <dgu...@yandex.ru>
Commit: Dmitry Gutov <dgu...@yandex.ru>

    Always declare x-gtk-resize-child-frames as special
    
    This can also help when someone upgrades 26 -> 27 without recompiling
    this package.
---
 posframe.el | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/posframe.el b/posframe.el
index 248d399..ccfe898 100644
--- a/posframe.el
+++ b/posframe.el
@@ -208,6 +208,9 @@ frame.")
 (defvar-local posframe--initialized-p nil
   "Record initialize status of `posframe-show'.")
 
+;; Avoid compilation warnings on Emacs < 27.
+(defvar x-gtk-resize-child-frames)
+
 (defvar posframe-gtk-resize-child-frames
   (when (and
          (> emacs-major-version 26)